Drop hover:on-demand support & let touch-screens report "none" instead.

third_party/WebKit/Source/core/css/MediaQueryExp.cpp

 /*
  * CSS Media Query
  *
  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 37 matching lines @@
 
   if (mediaFeature == orientationMediaFeature)
     return ident == CSSValuePortrait || ident == CSSValueLandscape;
 
   if (mediaFeature == pointerMediaFeature ||
       mediaFeature == anyPointerMediaFeature)
     return ident == CSSValueNone || ident == CSSValueCoarse ||
            ident == CSSValueFine;
 
   if (mediaFeature == hoverMediaFeature || mediaFeature == anyHoverMediaFeature)
-    return ident == CSSValueNone || ident == CSSValueOnDemand ||
-           ident == CSSValueHover;
+    return ident == CSSValueNone || ident == CSSValueHover;
 
   if (mediaFeature == scanMediaFeature)
     return ident == CSSValueInterlace || ident == CSSValueProgressive;
 
   if (RuntimeEnabledFeatures::mediaQueryShapeEnabled()) {
     if (mediaFeature == shapeMediaFeature)
       return ident == CSSValueRect || ident == CSSValueRound;
   }
 
   if (mediaFeature == colorGamutMediaFeature) {
@@ skipping 255 matching lines @@
     output.append('/');
     output.append(printNumber(denominator));
   } else if (isID) {
     output.append(getValueName(id));
   }
 
   return output.toString();
 }
 
 }  // namespace blink